EN8M Bright Bars, EN8M Bright Bar Manufacturers, EN8M Bright Bar Suppliers, EN8M Bright Bar Stockist, EN8M Bright Bar Dealers, EN8M Bright Bar Distributors, EN8M Bright Bar Wholesalers, EN8M Bright Bar Steel Traders, EN8M Steel Bright Bar Hexagon Distributors, EN8M Steel Bright Round Bar, EN8M Steel Bright Bar Companies Near me.
Grade Introduction:
EN8M Bright Bars is an important type of free cutting steel that has
made its way into the market. These are widely used by several
industries for the use in the production of the above mentioned
instruments and parts. As this type of steel forms chips when it is
worked on, they can take up only an average amount of heavy duty items
at a time. When they are sold in the market, the grade of the free
cutting varies with its composition. Sulphur or phosphorous are the
two main types of ingredients that are added to the steel, apart from
some little amounts of carbon.
EN8M type of free-cutting steel in Bright Bars has Sulphur added to it
with a medium amount of carbon. They are mostly round or hexagonal in
shape. These bars are used for making shafts, gears, studs, pins and
gears.
Bright Bars have found usage at a very wide scale, extending quality
construction finish, anti-corrosive properties, and high durability.
Grade Application:
These bars are used for making shafts, gears, studs, pins and gears.
Equivalent grades:
| USA | Japanese | Germany | British | France | International | Chinese |
| ASTM&AISI&SAE | JIS | EN DIN | EN BS | EN NF | ISO | GB |
| 1345 | SMnC443 | EN8M | EN8M | EN8M | —— | 45Mn2 |
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN36C, EN41B, EN43B, EN47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, 2714, SKD-11, P20, P20+S, P20+Ni, SCM 420, ASTM SA-36, ASTM SA-105, SAE 1018, SAE 1020, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE 52100, S40C, S355J2G3.
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Chemical composition:
The following table shows the chemical composition of EN8M steel:
| Element | C | Si | Mn | P | S |
| Content (%) | 0.35 – 0.45 | 0.25 | 1.00 – 1.30 | 0.060 Max | 0.12-0.20 |
Mechanical Properties:
| Properties | Metric | Imperial |
| Hardness, Brinell (typical) | 300 | 33 |
| Hardness, Rockwell C (typical) | 30 | 30 |
| Tensile strength, ultimate | 965-1030 MPa | 140000-150000 psi |
| Tensile strength, yield | 827-862 MPa | 120000-125000 psi |
| Elongation at break (in 50 mm (2″)) | 20.0% | 20.0% |
| Compressive strength | 862 MPa | 125000 psi |
| Charpy impact (V-Notch) | 27.1-33.9 J | 20.0-25.0 ft-lb |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elastic modulus | 190-210 GPa | 27557-30457 ksi |
Hardness:
300
Heat Treatment:
Heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each EN8M steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities.
Hardening:
Heat the component slowly to 820-860°C and allow it to be heated through. Quench in oil or water.
Tempering:
Temper the EN8M component immediately after quenching whilst tools are still hand warm. Re-heat the EN8M component to the tempering temperature then soak for one hour per 25 millimeter of total thickness (2 hours minimum) Cool in air. For most applications tempering of EN8M will be between 550-660°C.
Physical Properties
Thermal Properties
Forging Properties:
Preheat the steel carefully, then raise temperature to 1050°C for forging. Do not forge below 850°C. After forging cool slowly, preferably in a furnace.
Stress Relieving:
Normalizing:
Annealing:
Heat slowly to 680-710°C, soak well. Cool slowly in the furnace.
Density:
Machinability:
Welding:
Supply Cities:
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